Define what you want the accessory to do
A case used during a call and a closed storage pouch have different intended uses. Write down whether you need physical protection, device storage or documented signal attenuation. Do not treat those functions as interchangeable.
Ask about the complete setup
Request documentation for the exact case and phone configuration. Ask which surfaces are covered, how the phone was positioned, and whether the result applies with the case open or closed. Check compatibility, charging access and return terms.
Consider the connection
The FTC warns that partial phone shields can be ineffective and that interference with a signal may cause a phone to increase its power. A marketing demonstration is not enough to establish a reduction in the user’s exposure.
Keep your buying notes
Record the model, intended use, report link and unanswered questions. Compare those details across providers rather than choosing on a single percentage headline. Browse phone accessories criteria.